Malicious PDF — malware analysis report

Static analysis result for SHA-256 87936f7eabd20e78…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 08:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e06510cc07280f7b477f092844758da SHA-1: 11d92d99ee79f27c5c160d35823d5972342587de SHA-256: 87936f7eabd20e7800c44b07a2ac746f9756832fcd6ba225f921338ce29ae2c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an attempt to create a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a direct link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=skillstreaming+the+adolescent+%25287-12%2529'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=skillstreaming+the+adolescent+%25287-12%2529
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/19404742589.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/69129143282.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/95238801257.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/zejamiser.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/rogalobuwegokevalijimadeb.pdf
    • https://cdn.shopify.com/s/files/1/0447/9169/3463/files/easy_ukulele_songs_with_chord_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/77870826541.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/muloregokidisaxesijej.pdf
    • https://static.usrfiles.com/ugd/b8c837_87d00bb687ca4e67b4ae52a38c2d35ef.pdf
    • https://static.usrfiles.com/ugd/37428b_ac30836c0b934e17a7027842254e70a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_311dbce3144d43c98b3106dcf7d0116c.pdf
    • https://static.usrfiles.com/ugd/1813b3_beffe130fe3945c6bc52cb9296e50096.pdf
    • https://static.usrfiles.com/ugd/3aee12_8e44a3649b6546828a09a47a7383b625.pdf
    • https://static.usrfiles.com/ugd/917232_72398c185cae4e759d1bcb8e38ae2d01.pdf
    • https://static.usrfiles.com/ugd/f84671_030eca095b304ad8ad7243b51df6e113.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb6f0d2e3f224ffdbc54b9370b056c71.pdf
    • https://static.usrfiles.com/ugd/a382ee_7421c51a05d64187b8456aefe73d2523.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006554.bin
428f8256c9a4e9b92104dbfd3cdb702c2d0db43efd367b6d41eb9f34e0d96461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6554 5972 bytes
font_01_sfnt_off00007986.bin
294f8b923f7311587e509c73e3283cbe9d4d95cbcd932667f0b78bb5384228c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 10328 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.